The most important exception to sovereign immunity is the commercial activity exception, 28 U.S.C. § 1605(a)(2). This section provides three bases on which a plaintiff can sue a foreign state: • When the plaintiff's claim is based upon a commercial activity carried on in the United States by the foreign state. • When the plaintiff's claim is based upon an act by the foreign state which is performed in the United States in connection with commercial activity outside the United States. • When the plaintiff's claim is based upon an act by the foreign state which is performed outside the United States in connection with commercial activity outside the United States and which causes a direct effect in the United States. In determining whether a foreign state's activities are commercial, the FSIA requires that courts look to the nature of the act itself, rather than the purpose for which the foreign sovereign engaged in the act (28 U.S.C. § 1603(d)). For example, the operation of a fee-based transportation system would likely be a commercial act, while imposing fines for parking tickets would be a public act, even if the former was undertaken to provide a public service, and the latter was initiated to raise revenue.
Republic of Argentina v. Weltover, 504 U.S. 607 (1992), concerned a breach of contract claim asserted by the bond-holder (two Panamanian corporations and a Swiss bank) against the government (Argentina) that issued the bonds arising from Argentina's default on the bond payments. Under the terms of the bonds, the bond-holders were given the option of having the bonds paid in
London,
Frankfurt,
Zürich, or New York. Because the case concerned a default in Argentina on bonds issued in Argentina (i.e., an act performed outside the United States in connection with activity outside the United States), in order to establish jurisdiction, the plaintiff's could only rely on the third basis to sue Argentina under the commercial activity exception. Argentina made two primary arguments as to why the FSIA commercial activity exception should not apply: (1) the issuance of sovereign debt to investors was not a "commercial" activity and (2) the alleged default could not be considered to have had a "direct effect" in the United States. In a unanimous opinion written by Justice
Antonin Scalia, the Supreme Court held that Argentina was not entitled to sovereign immunity. Reasoning that "when a foreign government acts, not as regulator of a market, but in the manner of a private player within it, the foreign sovereign's actions are 'commercial, the Court concluded that Argentina's issuance of the bonds was of a commercial character. As for the "direct effect" in the United States, the Court rejected the suggestion that under the FSIA the effect in the United States necessarily needed to be "substantial" or "foreseeable", and instead concluded that in order to be "direct", the effect need only follow "as an immediate consequence of the defendant's activity". Because New York was the place where payment was supposed to be made, and payment "was not forthcoming", the Court concluded that the effect was direct, notwithstanding the fact that none of the plaintiffs were situated in New York. Weltover's oral argument that won the unanimous decision was made by New York-based attorney Richard Cutler, while Argentina's losing position was argued by New York-based attorney Richard Davis. The
District Court for the District of Columbia held in
Upton v Empire of Iran, 459 F. Supp. 264 (D.D.C. 1978), that "direct effect" is to be given its common sense interpretation: a direct effect "has no intervening element, but, rather, flows in a straight line without deviation or interruption". The involvement of a
US citizen or a body incorporated in the United States is not in itself sufficient to establish a "direct effect" in the United States if a case involves no other form of direct connection. In 2015, the Supreme Court unanimously held in
OBB Personenverkehr AG v. Sachs that the purchase of a rail ticket from an authorized agent in the US does not fall within the commercial activity exception when the lawsuit concerns a rail accident in a foreign country. Carol Sachs, a US resident, purchased a
Eurail pass on the internet from a US-based travel agent. She used the pass to board a train operated by the Austrian national railway, ÖBB Personenverkehr AG (ÖBB), but during the process she fell onto the tracks and her legs were crushed by the moving train, requiring the amputation of both of her legs. Sachs sued ÖBB in the
United States District Court for the Northern District of California for damages related to the incident. She reasoned that the suit was not barred by the FSIA because it was "based upon" the sale of the ticket by the US-based travel agent. The court ruled that the suit did not fall within the commercial activities exception. It was appealed to the
United States Court of Appeals for the Ninth Circuit, which reversed the judgment, holding that the purchase of the ticket from a US-based travel agent established
agency. The Supreme Court looked at the "particular conduct on which the [lawsuit] is based" and held that, because that conduct occurred in Austria, the case did not fall within the commercial activities exception.
Genocidal takings One student's note has argued that matters of genocidal takings are regarded as exceeding the jurisdictional limits of the FSIA's international takings exception. In June 2017, a divided panel of the
United States Court of Appeals for the District of Columbia Circuit found the FSIA did not prevent the survivors of a Holocaust victim from suing to recover art stolen by
Nazi plunderers. However, the ruling was challenged by Germany to the
United States Supreme Court, which ruled in a unanimous decision in February 2021 that FSIA does not permit legal action to be taken against foreign states for property taken from individuals by foreign states, as the provisions of FSIA are directed towards state property taken by other states, and vacated the lower court rulings. The case,
Germany v. Philipp, dealt with the applicability of the FSIA for heirs of victims of the
Holocaust to sue Germany in the United States court systems for compensation for items that were taken by the
Nazi Party during
World War II. The court unanimously ruled that FSIA does not allow these survivors to sue Germany in U.S. court, reasoning that the sale was an act of
expropriation of property rather than an act of genocide, although granting that other means of recovery are still potentially available. The decision also concluded a related case,
Hungary v. Simon, which was decided
per curiam on the ruling of
Germany.
Industrial espionage by state-owned enterprises FSIA has been invoked by
state-owned enterprises as well as their subsidiaries and joint ventures, particularly those owned by the People's Republic of China, accused of
industrial espionage and
intellectual property theft, as a defense from legal action.
COVID-19 In ''
The State of Missouri v. The People's Republic of China'',
Missouri sued China in April 2020 for economic damages caused by
COVID-19. The
U.S. District Court for the Eastern District of Missouri dismissed the case in July 2022, ruling that China had sovereign immunity. Missouri appealed. In January 2024, the
U.S. Court of Appeals for the Eighth Circuit held that the FSIA barred all of Missouri's claims except one—alleging that China hoarded
personal protective equipment—under the commercial activity exception. The Eighth Circuit Court reversed the dismissal of the hoarding claim and remanded the case for further proceedings. In March 2025, the district court ruled that Missouri "has established this claim of damages through evidence satisfactory to the court" and issued a default judgment against the defendants, awarding Missouri over $24 billion in damages. ==Notable legal cases==